<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png">
      </div>
      <!-- 登录表单区域 -->
      <el-form label-width="0px" class="login_form" :model="loginForm" :rules="loginFormRules" ref="loginFormRef">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input prefix-icon="el-icon-lock" v-model="loginForm.password" type="password"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>        
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data(){
    return{
      // 登录表单数据绑定对象
      loginForm:{
        username:'admin',
        password:'123456'
      },
      // 表单验证规则对象
      loginFormRules:{
        // 验证用户名是否合法
        username:[
          { required: true, message: '请输入登录名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码是否合法
        password:[
          { required: true, message: '请输入登录密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }          
        ]
      }
    }
  },
  methods: {
    resetLoginForm(){
      this.$refs.loginFormRef.resetFields()
    },
    login(){
      this.$refs.loginFormRef.validate(async valid=>{
        if(!valid)return
        const {data:res}=await this.$http.post('login',this.loginForm)
        if(res.meta.status !==200)return this.$message.error('登录失败')
        this.$message.success('登录成功')
        window.sessionStorage.setItem('token',res.data.token)
        this.$router.push('/home')
      })
    }
  },
}
</script>

<style lang="less" scoped>
  .login_container{
    background-color: #2b4b6b;
    height: 100%;
  }
  .login_box{
    height: 300px;
    width: 450px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    .avatar_box{
      height: 130px;
      width: 130px;
      border:1px solid #eee;
      border-radius: 50%;
      padding: 10px;
      box-shadow: 0 0 10px #ddd;
      position: absolute;
      left:50%;
      transform: translate(-50%,-50%);
      background-color: #fff;
      img{
        height: 100%;
        width: 100%;
        border-radius: 50%;
        background-color: #eee;
      }
    }
  }

  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 10px;
    box-sizing: border-box;
  }
  .btns{
    display: flex;
    justify-content: flex-end;
  }
</style>